<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      const pos = {
        x: 10,
        y: 20,
      }
      //   function move(obj) {
      //     console.log(obj.x)
      //     console.log(obj.y)
      //   }
      //   move(pos)
      //   let {x,y}=pos
      // 重命名=》y: newY
      // 形参上解构出来的变量，相当于是函数范围内let声明的一个变量，是可以修改的
      function move1({ y: newY, x }) {
        console.log(x) // 10
        console.log(newY) // 20
        x = 666
        console.log(x) // 666
      }
      move1(pos)

      function move2([a = 0, b, c, d = 20]) {
        console.log(a, b, c, d) // 1 2 3 20
      }
      move2([1, 2, 3])
    </script>
  </body>
</html>
